Gussie’s three-year-old sister. Johnny one day takes her, Francie, and Neeley to Canarsie to go fishing. Johnny feels sorry for Tilly, due to her being the younger sister of a boy whom he finds repulsive. Tilly does not speak at all during the trip until Johnny drops her off at her apartment. Her mother is outraged when Tilly arrives dripping wet and smelling of vomit from having thrown up on the way home. She finally utters, “T’anks,” before her mother ushers her inside.